Adjustable aerobar riser assembly for a bicycle

ABSTRACT

An adjustable riser assembly for mounting a handle bar assembly on a bicycle comprising a riser post; a tilt adjustment plate; the riser post including a curved mounting surface for receiving the tilt adjustment plate and the curved mounting surface being configured to support the tilt adjustment plate in a range of adjustable angular positions; and a bolt fastener for securing the tilt adjustment to the riser post in an angular position or a horizontal position.

FIELD OF THE INVENTION

The present invention relates to bicycles and more particularly, to an adjustable aerobar riser assembly for a bicycle.

BACKGROUND OF THE INVENTION

In the art, aerodynamically designed bicycles are common place at triathlon events. Triathlons continue to remain popular and the majority of participants are non-professional athletes, commonly referred to as age groupers. Age groupers represent a cross section of the population. To fully benefit from the aero advantages of today's aero bikes, a proper fit for the rider is crucial. Therefore, the adjustability of the bicycle components to achieve the proper fit can become critical.

Accordingly, there remains a need for improvements in the art.

BRIEF SUMMARY OF THE INVENTION

The present invention is directed to an adjustable aerobar riser assembly suitable for use with an aerodynamic bicycle or aero bike.

According to one aspect, the present invention comprises an adjustable riser assembly for mounting a handle bar assembly on a bicycle comprising a riser post; a tilt adjustment plate; the riser post including a curved mounting surface for receiving the tilt adjustment plate and the curved mounting surface being configured to support the tilt adjustment plate through a range of adjustable positions; and a fastener for securing the tilt adjustment plate to the riser post in an angular or a horizontal position.

According to another aspect, the present invention comprises a bicycle frame comprising: a fork assembly; a bottom bracket; a top tube, a head tube, and a down tube; one end of the top tube and one end of the down tube being affixed to the head tube, and another end of the top tube being affixed to a seat tube; first and second chain stays, and one end of each of the chain stays being affixed to the bottom bracket; the fork assembly being operatively coupled to said head tube; an adjustable riser assembly configured for receiving an extension bar assembly; the adjustable riser assembly comprising, a riser post, the riser post being operatively coupled to the fork assembly; a tilt adjustment plate; the riser post including a curved mounting surface for receiving the tilt adjustment plate and the curved mounting surface being configured to support the tilt adjustment plate through a range of angular positions; and one or more fasteners for securing the tilt adjustment plate to the riser post in an angular position or a substantially horizontal position.

Other aspects and features of the present invention will become apparent to those ordinarily skilled in the art upon review of the following description of embodiments of the invention in conjunction with the accompanying figures.

BRIEF DESCRIPTION OF THE DRAWINGS

Reference will now be made to the accompanying drawings which show, by way of example, embodiments of the present invention, and in which:

FIG. 1 shows in diagrammatic form an aerodynamic bicycle with an adjustable riser assembly according to an embodiment of the present invention;

FIG. 2 is an exploded view of the adjustable riser assembly of FIG. 1 according to an embodiment of the present invention;

FIG. 3 is a side view of the adjustable riser assembly of FIG. 1 with the aerobar extension(s) mounted in the adjustable riser assembly;

FIG. 4A shows an extension bar and pad mount assembly for mounting on the adjustable riser assembly;

FIG. 4B shows an extension bar and pad mount assembly mounted on the adjustable riser assembly in a forward position according to an embodiment of the present invention;

FIG. 4C shows an extension bar and pad mount assembly mounted on the adjustable riser assembly in a setback position according to an embodiment of the present invention;

FIG. 5A shows a side view of an aerodynamic bicycle with the riser post configured in an extended position for the adjustable riser assembly of FIG. 2, according to an embodiment of the present invention;

FIG. 5B shows a close-up side view of the aerodynamic bicycle of FIG. 5A with the riser post in an extended position;

FIG. 5C shows a close-up left front view of the aerodynamic bicycle of FIG. 5A with the riser post in an extended position; and

FIG. 5D shows a close-up left front view of the aerodynamic bicycle of FIG. 5A with the riser post in an extended position.

Like reference numerals indicate like or corresponding elements or components in the drawings.

DETAILED DESCRIPTION OF THE EMBODIMENTS OF THE INVENTION

Reference is first made to FIG. 1, which shows in diagrammatic form an aerodynamic bicycle, i.e. an aero bike, with an adjustable riser assembly according to an embodiment of the present invention. The aerodynamic bicycle is indicated generally by reference 10 and the adjustable riser assembly is indicated generally by reference 100. While the adjustable riser assembly is described in the context of aero bike, it will be appreciated that the adjustable riser assembly is applicable and adaptable to other bike configurations or geometries.

As shown in FIG. 1, the aero bike 10 comprises a frame 20, a fork assembly and front 40 and rear 42 wheels. According to an exemplary embodiment, the frame 20 comprises a “beam configuration” as will be understood by those skilled in the art. The frameset or frame 20 comprises a top tube 22, a bottom tube 24, a bottom bracket 25, chain stays 26 (only the right chain stay being shown in FIG. 1) and a fork assembly 30. According to an exemplary embodiment, the frame 20 comprises an external steerer configuration with a head tube 32 for coupling the fork assembly 30 to the frame 20, and separate steerer tube 34 in the fork assembly for mounting a handlebar assembly, e.g. aerobar assembly, indicated generally by reference 36. As shown in FIG. 1, the top tube 22 includes a seat post section 28 and adjustable seat post 27 for mounting a saddle indicated by reference 29. According to another aspect, the front 40 and 42 wheels comprise aerodynamic wheels with a deep flange or full disc configuration. The specific implementation and/or assembly details and additional components required for setting up the bicycle 10 and the frameset 20 will be readily apparent to those skilled in the art.

According to an embodiment of the present invention, the bicycle 10, i.e. aero bike, includes an adjustable riser assembly 100, which as will be described in more detail below provides the capability to adjust the height, and/or angle or tilt, of the handlebar assembly 36, i.e. an extension bar assembly configured for riding the bicycle in an aerodynamic rider position, i.e. riding in “aero”.

As shown in FIG. 2, the adjustable riser assembly 100 comprises a riser post 110 and a tilt adjustment plate indicated generally by reference 120. The riser post 110 is configured to mount inside the steerer tube or assembly 34 and adjustable in height, up and down, as indicated by arrow 35, for raising or lowering the position of the handlebar assembly 36 on the bicycle 10 as shown in FIG. 1. The adjustable riser assembly 100 is configured to pivot or tilt the attached handlebar assembly 36, relative to a horizontal plane 29, as indicated by arrow 129 in FIG. 1.

As shown, the riser post 110 has a curved upper surface indicated by reference 112 in FIG. 2. The tilt adjustment plate 120 is configured to sit on top of the curved surface 112 of the riser post 110, and with the curved surface the tilt adjustment plate 120 can be tilted fore and aft or positioned in a substantially horizontal position. To secure the tilt adjustment plate 120 and also fix the plate 120 in a tilted position or a horizontal position, the tilt adjustment plate 120 includes two bores holes 121, indicated individually by references 121 a and 121 b, for receiving respective riser bolt fasteners 122 a and 122 b. According to an exemplary implementation, the bore holes 121 have a chamfer and the bolt fasteners 122 have a corresponding tapered shoulder. The riser post 110 includes respective elongated openings 114 a and 114 b which are configured for receiving the bolt fasteners 122 a and 122 b. The bolt fasteners 122, and the tilt adjustment plate 120, are secured to the riser post 110 by respective barrel nuts 116, indicated individually by references 116 a and 116 b, which are inserted into respective bore holes 117 a and 117 b in the riser post 110 as shown in FIG. 2. Once the tilt adjustment plate 120 is positioned at the desired angle, the riser bolts 122 are tightened in the barrel nuts 116 and the plate 120 is pulled tight against the curved upper surface 112 of the riser post 110.

Reference is made to FIGS. 5A to 5D, which show an “aero” bike with the riser post 110 in an extended position for the adjustable riser assembly 100 according to an embodiment of the present invention. FIG. 5A shows a side-view the bicycle 10 with the riser post 110 in an extended position. FIG. 5B is a close-up side-view of the riser post 110 in the extended position. FIG. 5C shows a front side-view of the riser post 110 in the extended position. FIG. 5D is a close-up front side-view of the riser post 110 in the extended position.

Reference is next made to FIGS. 3 and 4, which show the tilt adjustment plate 120 secured to the riser post 110, and an extension bar and arm pad mount assembly 130 (FIG. 4) attached to the tilt adjustment plate 120. As shown in FIGS. 2 and 4, the tilt adjustment plate 120 includes a mounting slot and surface indicated generally by reference 124 for receiving and securing the extension bar and arm pad mount assembly 130. The extension bar and arm pad mount assembly 130 comprises a pair of extension bar mounting sockets 132, indicated by reference 132 a and 132 b, each configured to receive an extension bar 140, e.g. a multi-bend extension handle bar 140 as shown in FIG. 3. According to an exemplary implementation, the riser post 110 and the tilt plate 120 are configured to provide +12/−5 degree tilt adjustment as shown in FIG. 3.

As shown in FIG. 4, the extension bar and arm pad mount assembly 130 is secured to the mounting slot and surface 124 on the tilt adjustment plate 120 using mechanical fasteners, for instance, bolt fasteners or machine screws 134, indicated individually by references 134 a, 134 b, 134 c and 134 d. The extension bar and arm pad mount assembly 130 is configured with mounting holes, i.e. chamfered bored-through holes, 135, indicated individually by references 135 a, 135 b, 135 c and 135 d, for receiving the bolt fasteners 134 and securing the extension bar and arm pad mount assembly 130 to the tilt adjustment plate 120. As shown in FIG. 4, the mounting slot 124 includes threaded sockets 136, indicated individually by references 136 a, 136 b, 136 c and 136 d, for tightening and securing the extension bar and arm pad mount assembly 130. While described in the context machine screw fasteners and threaded sockets, it will be appreciated that other mechanical fasteners may also be utilized for securing the extension bar and arm pad mount assembly 130 to the tilt adjustment plate 120 and the riser post 110.

According to another aspect, the tilt adjustment plate 120 is configured to mount the extension bar and arm pad mount assembly 130 in a forward position as shown and indicated generally by reference 131 in FIG. 4B, and also in a setback position as shown and indicated generally by reference 133 in FIG. 4C. According to an exemplary embodiment, the extension bar and arm pad mount assembly 130 comprises an asymmetric shape in relation to the mounting holes 135 as shown in FIG. 4B and FIG. 4C. In the forward mount position 131, the extension bar and arm pad mount assembly 130 is secured to the tilt adjustment plate 120 with the mounting holes at the rear, i.e. proximate the head tube. On the other hand, in the setback position 133, the extension bar and arm pad mount assembly 130 is flipped around, i.e. rotated 180°, and secured to the tilt adjustment plate 120 with the mounting holes at the front, i.e. away from the head tube, as shown in FIG. 4C. According to embodiment, extension bar mounting sockets 132 are provided on both sides of the extension bar and arm mount assembly 130. According to an exemplary implementation, the extension bar mounting sockets 132 may comprise a bore-through hole, or respective blind sockets which do not extend all the way through the extension bar assembly 120.

The present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Certain adaptations and modifications of the invention will be obvious to those skilled in the art. Therefore, the presently discussed embodiments are considered to be illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. 

What is claimed is:
 1. An adjustable riser assembly for a bicycle, comprising: a tilt adjustment plate; a riser post including a curved mounting surface for receiving the tilt adjustment plate and supporting the tilt adjustment plate through a range of angular positions; and a fastener for securing the tilt adjustment plate to the riser post in one of the angular positions; wherein the tilt adjustment plate is configured to mount an extension bar assembly either in a forward position or in a setback position, wherein the extension bar assembly is rotated 180 degrees relative to the tilt adjustment plate in the setback position.
 2. The adjustable riser assembly of claim 1, wherein the extension bar assembly includes first and second extension bar mounting sockets each configured for receiving an extension bar.
 3. The adjustable riser assembly of claim 2, wherein the first and second extension bar mounting sockets extend through the extension bar assembly and are configured to mount respective extension bars in the forward position and in the setback position.
 4. The adjustable riser assembly of claim 2, further comprising an arm pad mount assembly, and wherein the arm pad mount assembly includes the extension bar mounting sockets.
 5. The adjustable riser assembly of claim 1, wherein the range of angular positions for setting the extension bar assembly is between approximately −5° to +12°.
 6. The adjustable riser assembly of claim 1, wherein the riser post is adjustable in height, up and down, for raising or lowering the extension bar assembly.
 7. An adjustable riser assembly for a bicycle, the adjustable riser assembly comprising: a tilt adjustment plate configured to mount an extension bar assembly in either a forward mount position or in a setback position; a riser post including a curved mounting surface for receiving the tilt adjustment plate and supporting the tilt adjustment plate through a range of angular positions; and a fastener for securing the tilt adjustment plate to the riser post in a selected one of the angular positions; wherein the extension bar assembly has an asymmetric shape, with the forward mount position defined by a first orientation of the asymmetric shape with respect to the tilt adjustment plate, and the setback position defined by a second orientation of the asymmetric shape with respect to the tilt adjustment plate.
 8. The adjustable riser assembly of claim 7, further comprising an arm pad mount assembly attachable to the tilt adjustment plate.
 9. The adjustable riser assembly of claim 8, wherein the arm pad mount assembly includes first and second extension bar mounting sockets each configured for receiving an extension bar.
 10. The adjustable riser assembly of claim 9, wherein the first and second extension bar mounting sockets extend through the arm pad mount assembly and are configured to mount respective extension bars in the forward mount position and in the setback position.
 11. The adjustable riser assembly of claim 7, wherein the range of angular positions is between approximately −5° to +12°.
 12. The adjustable riser assembly of claim 7, wherein the riser post is adjustable in height, up and down, for raising or lowering the extension bar assembly.
 13. The adjustable riser assembly of claim 7, wherein the second orientation of the asymmetric shape is rotated 180 degrees relative to the first orientation of the asymmetric shape.
 14. A bicycle frame comprising: a top tube, a head tube, and a down tube, one end of the top tube and one end of the down tube affixed to the head tube, and another end of the top tube affixed to a seat tube; a fork assembly operatively coupled to the head tube; a bottom bracket; first and second chain stays, one end of each of the chain stays affixed to the bottom bracket; and an adjustable riser assembly, comprising: a tilt adjustment plate configured to mount an extension bar assembly in either a forward mount position or in a setback position; a riser post operatively coupled to the fork assembly, including a curved mounting surface for receiving the tilt adjustment plate and for supporting the tilt adjustment plate through a range of angular positions; and a fastener for securing the tilt adjustment plate to the riser post in a selected one of the angular positions; wherein the extension bar assembly has an asymmetric shape, with the forward mount position defined by a first orientation of the asymmetric shape with respect to the tilt adjustment plate, and the setback position defined by a second orientation of the asymmetric shape with respect to the tilt adjustment plate.
 15. The bicycle frame of claim 14, wherein the extension bar assembly includes first and second extension bar mounting sockets each configured for receiving an extension bar.
 16. The bicycle frame of claim 15, wherein the first and second extension bar mounting sockets extend through the extension bar assembly and are configured to mount respective extension bars in the forward mount position and in the setback position.
 17. The bicycle frame of claim 15, wherein the range of angular positions is between approximately −5° to +12°.
 18. The bicycle frame of claim 15, wherein the riser post is adjustable in height, up and down, for raising or lowering the extension bar assembly.
 19. The bicycle frame of claim 14, wherein the second orientation of the asymmetric shape is rotated 180 degrees relative to the first orientation of the asymmetric shape.
 20. The bicycle frame of claim 14, wherein in the forward mount position, the extension bar assembly is secured to the tilt adjustment plate with mounting holes proximate the head tube, and in the setback position, the extension bar assembly is secured to the tilt adjustment plate with mounting holes distal the head tube. 